Section 11 (Entertainment System): Camera: Wiring Diagram
WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
For the wiring diagram, refer to "Rearview Camera System" in the wiring diagram. Ref. to WIRING SYSTEM>REARVIEW CAMERA SYSTEM>WIRING DIAGRAM